Disk Utility Icon

Rebuilding a mirrored RAID set

You can add a disk to a mirrored RAID set to increase the capacity of the set or replace a damaged disk. When you do, Disk Utility updates and rebuilds the RAID set.

When you add a disk to the RAID set, all of the files are erased. Be sure to make a copy of any important files on the disk before you add it to the set.

  1. Connect the new disk to your computer.
  2. In Disk Utility, select one of the RAID disks in the list of disks and volumes, then click RAID.
  3. Drag the new disk to the RAID list on the right.
  4. To remove a disk, select it.
  5. Click Update.

See also

RAID

repairing disks